A clamping method for stabilizing cantilever weak rigidity parts

Abstract

This invention relates to a clamping method for stabilizing cantilevered weakly rigid parts. The cantilevered weakly rigid part has a fixed part and a cantilever part. The fixed part can be fixed on a machining plane, and the cantilever part is suspended relative to the machining plane. The clamping method uses a wedge-shaped support block and a dial indicator. The bottom of the wedge-shaped support block can slide horizontally on the machining plane and can be fixed on the machining plane when it moves to a suitable position. The upper part of the wedge-shaped support block is an inclined plane, and the inclined plane forms an angle greater than zero degrees with the horizontal plane. This method is not limited by the material and structure of the cantilevered part and can be applied to most cantilevered parts. It is particularly effective for machining cantilevered weakly rigid parts on aero engines. The application of this method successfully solves the deformation and vibration generated during the machining of cantilevered parts. It has good application effect, low implementation cost, wide application range, and is easy to operate.

Description

Technical Field

[0001] This invention relates to the field of high-precision machining technology, and in particular to a stable clamping method for cantilever-like weakly rigid parts. Background Technology

[0002] Machining cantilevered thin-walled parts generally results in poor rigidity, significant deformation during machining, and accompanying vibration, affecting machining accuracy. Furthermore, clamping cantilevered thin-walled parts is difficult, leading to further deformation and failure to meet machining requirements. Therefore, ensuring no deformation and minimizing vibration during clamping of cantilevered thin-walled parts is challenging, and dimensional control is difficult, resulting in widespread high machining difficulty, low production efficiency, and low yield rates. Currently, a common approach to address this is to add traditional rigid auxiliary supports to the fixture to improve the rigidity of thin-walled parts. These supports typically use a screw mechanism for adjustment. After adjustment, the support rod is fixed and machining begins. During machining, the part undergoes some deformation, creating gaps between the support rod and the part. Conventional clamping methods are ineffective and can even exacerbate deformation and vibration. Summary of the Invention

[0003] The purpose of this invention is to provide a clamping method for stabilizing cantilevered weakly rigid parts, thereby increasing the mounting rigidity of such parts on the fixture, improving strength, reducing part deformation and vibration during processing, and improving processing accuracy.

[0004] The technical solution of this invention is:

[0005] A clamping method is provided for stabilizing a cantilevered weakly rigid part. The cantilevered weakly rigid part has a fixed part and a cantilever part. The fixed part can be fixed on a machining plane, and the cantilever part is suspended relative to the machining plane. The clamping method uses a wedge-shaped support block and a dial indicator. The bottom of the wedge-shaped support block can slide horizontally on the machining plane and can be fixed on the machining plane when it is moved to a suitable position. The upper part of the wedge-shaped support block is an inclined plane, and the inclined plane forms an angle greater than zero degrees with the horizontal plane.

[0006] The clamping method includes the following steps:

[0007] Step 1: Fix the fixed part of the cantilever weak rigid part to the machining plane, and make the probe of the dial indicator attached to the upper end of the cantilever part of the cantilever weak rigid part, keeping the pointer of the dial indicator at the reference position.

[0008] Step 2: Slide the wedge-shaped support block on the processing plane so that the inclined surface gradually approaches the cantilever;

[0009] Step 3: Make the wedge-shaped support block touch the lower end of the cantilever of the cantilever weak rigidity part. When the pointer of the dial indicator swings, and the swing amplitude or the change of the dial indicator value does not exceed the preset range, stop the wedge-shaped support block and fix the wedge-shaped support block on the processing plane.

[0010] Step 4: Inject curable adhesive at the contact support position between the wedge-shaped support block and the cantilever, so that the adhesive wraps around the wedge-shaped support block from the processing plane and extends to the side of the workpiece, and the thickness of the adhesive in contact with the side of the workpiece does not exceed 1 / 3 of the thickness of the side of the workpiece.

[0011] Step 5: After the adhesive has cured, it forms a rigid support with the wedge-shaped support block.

[0012] Furthermore, the curable adhesive is J-39 room temperature curing adhesive.

[0013] Furthermore, the preset range is within 0.01 mm.

[0014] Furthermore, the inclined surface of the wedge-shaped support block forms an angle of 3°–5° with the horizontal plane.

[0015] Furthermore, the wedge-shaped support block is made of nylon, wood, or hard plastic.

[0016] Furthermore, the wedge-shaped support block also has a shaft hole, the shaft hole is provided with a rotating shaft, the rotating shaft forms an eccentric cam, and the eccentric cam is located on the side of the cantilever portion. Rotating the rotating shaft can cause the eccentric cam to contact and support the cantilever portion from the side.

[0017] Furthermore, the wedge-shaped support block also has a threaded hole, in which a screw is fitted. The screw also passes through the eccentric cam, which can lock the eccentric cam and the wedge-shaped support block together. The eccentric cam is located on the side of the cantilever. Rotating the eccentric cam allows it to contact and support the cantilever from the side.

[0018] Furthermore, the wedge-shaped support block is a component, and the angle between the inclined surface of each wedge-shaped support block and the horizontal plane is different.

[0019] Furthermore, the curable adhesive coats the rear of the wedge-shaped support block.

[0020] Furthermore, in step 3, there are multiple wedge-shaped support blocks arranged in a triangular pattern, which slide and translate from the front end and both sides of the cantilever portion toward the cantilever portion.

[0021] Furthermore, the cross-section of the wedge-shaped support block is trapezoidal or rectangular.

[0022] As a preferred technical solution of the present invention, the angle wedge can provide multi-point support for cantilever spaces at different heights, and is not affected by the unevenness of the support surface, thus generating repeated positioning, achieving arbitrary support, and being flexible and convenient to use.

[0023] As a preferred technical solution of the present invention, the eccentric cam can adjust the distance by rotating the eccentric cam according to the different positions and sizes of the parts, using the difference in eccentricity between the inner and outer diameters, thereby increasing the partial positioning function of the parts. Moreover, it can also adjust the position of the parts on any fixture to limit the parts, making it flexible and convenient to use.

[0024] The advantages of this invention are: This invention changes the traditional rigid support method, utilizing the bonding strength of angled wedges and cured adhesive to provide a stable clamping method for cantilever parts, thereby improving the strength and installation rigidity of the parts. Simultaneously, the cured adhesive (especially J39, which exhibits minimal deformation after curing and does not affect accuracy) further strengthens the bond, effectively controlling part deformation and solving the problem of unqualified parts caused by clamping deformation. This method is not limited by the material and structure of the cantilever parts and can be applied to most cantilever parts, especially for machining weakly rigid cantilever parts on aero-engines, where it shows good results. The application of this method successfully solves the deformation and vibration problems generated during the machining of cantilever parts, demonstrating good application effects, low implementation cost, wide applicability, and ease of operation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of step 1;

[0026] Figure 2 This is a schematic diagram of step 2;

[0027] Figure 3 This is a schematic diagram of step 3;

[0028] Figure 4 This is a schematic diagram of step 4;

[0029] Figure 5a This is a schematic diagram showing that both sides of the cantilever are supported by wedge-shaped support blocks;

[0030] Figure 5b It is a comparison diagram of the height of the part where the adhesive contacts the cantilever and the side of the cantilever;

[0031] Figure 6 This is a schematic diagram of the adhesive coating around the rear of the wedge-shaped support block;

[0032] Figure 7 This is a top view of the cantilever section with three wedge-shaped support blocks arranged in a triangular pattern;

[0033] Among them: 1 - wedge-shaped support block, 2 - cantilever weak rigid part, 3 - dial indicator, 4 - curing adhesive. Detailed Implementation

[0034] The disclosed examples will be described more fully with reference to the accompanying drawings, in which some (but not all) of the disclosed examples are shown. In fact, many different examples may be described, and these examples should not be construed as limited to those set forth herein. Rather, these examples are described so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0035] A clamping method is provided for stabilizing a cantilevered weakly rigid part. The cantilevered weakly rigid part has a fixed part and a cantilever part. The fixed part can be fixed on a machining plane, and the cantilever part is suspended relative to the machining plane. The clamping method uses a wedge-shaped support block and a dial indicator. The bottom of the wedge-shaped support block can slide horizontally on the machining plane and can be fixed on the machining plane when it is moved to a suitable position. The upper part of the wedge-shaped support block is an inclined plane, and the inclined plane forms an angle greater than zero degrees with the horizontal plane.

[0036] The clamping method includes the following steps:

[0037] Step 1: Fix the fixed part of the cantilever weak rigid part to the machining plane, and make the probe of the dial indicator attached to the upper end of the cantilever part of the cantilever weak rigid part, keeping the pointer of the dial indicator at the reference position.

[0038] Step 2: Slide the wedge-shaped support block on the processing plane so that the inclined surface gradually approaches the cantilever;

[0039] Step 3: Make the wedge-shaped support block touch the lower end of the cantilever of the cantilever weak rigidity part. When the pointer of the dial indicator swings, and the swing amplitude or the change of the dial indicator value does not exceed the preset range, stop the wedge-shaped support block and fix the wedge-shaped support block on the processing plane.

[0040] Step 4: Inject curable adhesive at the contact support position between the wedge-shaped support block and the cantilever, so that the adhesive wraps around the wedge-shaped support block from the processing plane and extends to the side of the workpiece, and the thickness of the adhesive in contact with the side of the workpiece does not exceed 1 / 3 of the thickness of the side of the workpiece.

[0041] Step 5: After the adhesive has cured, it forms a rigid support with the wedge-shaped support block.

[0042] The curable adhesive is J-39 room temperature curing adhesive.

[0043] The preset range is within 0.01 mm.

[0044] The inclined surface of the wedge-shaped support block forms an angle of 3°–5° with the horizontal plane.

[0045] The wedge-shaped support block also has a shaft hole, and a rotating shaft is provided in the shaft hole. The rotating shaft forms an eccentric cam, and the eccentric cam is located on the side of the cantilever. Rotating the rotating shaft allows the eccentric cam to contact and support the cantilever from the side.

[0046] The wedge-shaped support block also has a threaded hole, in which a screw is fitted. The screw also passes through the eccentric cam, which can lock the eccentric cam and the wedge-shaped support block together. The eccentric cam is located on the side of the cantilever. Rotating the eccentric cam allows it to contact and support the cantilever from the side.

[0047] The wedge-shaped support block is a component, and the angle between the inclined surface of each wedge-shaped support block and the horizontal plane is different.

[0048] The curable adhesive coats the rear of the wedge-shaped support block.

[0049] The wedge-shaped support blocks in step 3 are multiple and arranged in a triangular pattern, and slide horizontally from the front end and both sides of the cantilever towards the cantilever.

[0050] The cross-section of the wedge-shaped support block is rectangular.

[0051] Descriptions of various advantageous arrangements have been shown for illustrative and descriptive purposes, but such descriptions are not intended to be exclusive or limited to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. Furthermore, different advantageous examples may describe different advantages compared to other advantageous examples. One or more examples have been selected and described in order to best illustrate the principles and practical application of the examples, and to enable those skilled in the art to understand that this disclosure contains various examples with various modifications suitable for the particular intended use.

Claims

1. A clamping method for stabilizing cantilevered weakly rigid parts, characterized in that: The cantilevered weakly rigid part has a fixed part and a cantilever part. The fixed part can be fixed on the machining plane, and the cantilever part is suspended relative to the machining plane. The clamping method uses a wedge support block and a dial indicator. The bottom of the wedge support block can slide horizontally on the machining plane and can be fixed on the machining plane when it is moved to a suitable position. The upper part of the wedge support block is an inclined plane, and the inclined plane forms an angle greater than zero degrees with the horizontal plane. The clamping method includes the following steps: Step 1: Fix the fixed part of the cantilever weak rigid part to the machining plane, and make the probe of the dial indicator attached to the upper end of the cantilever part of the cantilever weak rigid part, keeping the pointer of the dial indicator at the reference position. Step 2: Slide the wedge-shaped support block on the processing plane so that the inclined surface gradually approaches the cantilever; Step 3: Make the wedge-shaped support block touch the lower end of the cantilever of the cantilever weak rigidity part. When the pointer of the dial indicator swings, and the swing amplitude or the change of the dial indicator value does not exceed the preset range, stop the wedge-shaped support block and fix the wedge-shaped support block on the processing plane. Step 4: Inject curable adhesive at the contact support position between the wedge-shaped support block and the cantilever, so that the adhesive wraps around the wedge-shaped support block from the processing plane and extends to the side of the workpiece, and the thickness of the adhesive in contact with the side of the workpiece does not exceed 1 / 3 of the thickness of the side of the workpiece. Step 5: After the adhesive has cured, it forms a rigid support with the wedge-shaped support block.

2. The clamping method for stabilizing a cantilevered weakly rigid component as described in claim 1, characterized in that: The curable adhesive is J-39 room temperature curing adhesive.

3. The clamping method for stabilizing a cantilevered weakly rigid part as described in claim 1, characterized in that: The preset range is within 0.01 mm.

4. The clamping method for stabilizing a cantilevered weakly rigid part as described in claim 1, characterized in that: The inclined surface of the wedge-shaped support block forms an angle of 3°–5° with the horizontal plane.

5. The clamping method for stabilizing a cantilevered weakly rigid part as described in claim 1, characterized in that: The cross-section of the wedge-shaped support block is trapezoidal or rectangular.

6. The clamping method for stabilizing a cantilevered weakly rigid part as described in claim 1, characterized in that: The wedge-shaped support block also has a shaft hole, and a rotating shaft is provided in the shaft hole. The rotating shaft forms an eccentric cam, and the eccentric cam is located on the side of the cantilever. Rotating the rotating shaft allows the eccentric cam to contact and support the cantilever from the side.

7. The clamping method for stabilizing a cantilevered weakly rigid part as described in claim 1, characterized in that: The wedge-shaped support block also has a threaded hole, in which a screw is fitted. The screw also passes through the eccentric cam, which can lock the eccentric cam and the wedge-shaped support block together. The eccentric cam is located on the side of the cantilever. Rotating the eccentric cam allows it to contact and support the cantilever from the side.

8. The clamping method for stabilizing a cantilevered weakly rigid part as described in claim 1, characterized in that: The wedge-shaped support block is a component, and the angle between the inclined surface of each wedge-shaped support block and the horizontal plane is different.

9. The clamping method for stabilizing a cantilevered weakly rigid part as described in claim 1, characterized in that: The curable adhesive coats the rear of the wedge-shaped support block.

10. The clamping method for stabilizing a cantilevered weakly rigid component as described in claim 1, characterized in that: The wedge-shaped support blocks in step 3 are multiple and arranged in a triangular pattern, and slide horizontally from the front end and both sides of the cantilever towards the cantilever.

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